/*
* FIPS 180-2 SHA-224/256/384/512 implementation
* Last update: 02/02/2007
* Issue date:  04/30/2005
*
* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef SHA2_H
#define SHA2_H

#include <sys/types.h>

#define SHA224_DIGEST_SIZE ( 224 / 8)
#define SHA256_DIGEST_SIZE ( 256 / 8)
#define SHA384_DIGEST_SIZE ( 384 / 8)
#define SHA512_DIGEST_SIZE ( 512 / 8)

#define SHA256_BLOCK_SIZE  ( 512 / 8)
#define SHA512_BLOCK_SIZE  (1024 / 8)
#define SHA384_BLOCK_SIZE  SHA512_BLOCK_SIZE
#define SHA224_BLOCK_SIZE  SHA256_BLOCK_SIZE

#ifndef SHA2_TYPES
#define SHA2_TYPES
typedef u_char uint8;
typedef u_int32_t  uint32;
typedef u_int64_t uint64;
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
	uint32 tot_len;
	uint32 len;
	u_char block[2 * SHA256_BLOCK_SIZE];
	uint32 h[8];
} sha256_ctx;

typedef struct {
	uint32 tot_len;
	uint32 len;
	u_char block[2 * SHA512_BLOCK_SIZE];
	uint64 h[8];
} sha512_ctx;

typedef sha512_ctx sha384_ctx;
typedef sha256_ctx sha224_ctx;

void sha224_init(sha224_ctx *ctx);
void sha224_update(sha224_ctx *ctx, const u_char *message,
				uint32 len);
void sha224_final(sha224_ctx *ctx, u_char *digest);
void sha224(const u_char *message, uint32 len,
			u_char *digest);

void sha256_init(sha256_ctx * ctx);
void sha256_update(sha256_ctx *ctx, const u_char *message,
				uint32 len);
void sha256_final(sha256_ctx *ctx, u_char *digest);
void sha256(const u_char *message, uint32 len,
			u_char *digest);

void sha384_init(sha384_ctx *ctx);
void sha384_update(sha384_ctx *ctx, const u_char *message,
				uint32 len);
void sha384_final(sha384_ctx *ctx, u_char *digest);
void sha384(const u_char *message, uint32 len,
			u_char *digest);

void sha512_init(sha512_ctx *ctx);
void sha512_update(sha512_ctx *ctx, const u_char *message,
				uint32 len);
void sha512_final(sha512_ctx *ctx, u_char *digest);
void sha512(const u_char *message, uint32 len,
			u_char *digest);

#ifdef __cplusplus
}
#endif

#endif /* !SHA2_H */

